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Finding the Fourth Proportional to 520,216.80, 780,346.80 and 165,220.80

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Solution

The fourth proportional to 520,216.80, 780,346.80 and 165,220.80 is: 247,838.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,216.80 : 780,346.80 = 165,220.80 : x
  2. Step 2: Convert to fraction form
    520,216.80/780,346.80 = 165,220.80/x
  3. Step 3: Cross multiply
    520,216.80x = 780,346.80 × 165,220.80
  4. Step 4: Simplify right side
    520,216.80x = 128,929,522,573.44
  5. Step 5: Solve for x
    x = 128,929,522,573.44/520,216.80
  6. Step 6: Final answer
    x = 247,838.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.